Fixed Tx If Principle - Furuno FV-110GX Operator's Manual

Calibration
5.3.6

Fixed TX IF principle

The FV-110GX uses a TX IF gain concept. After calibration it provides a fixed average
gain from the TX-port of the ACU to the input of the BUC. Advantages of the fixed TX IF
gain principle are:
• Average TX IF gain independent of antenna cable length
• Compatibility with the GX TX Power control feature
When installing the FV-110GX you make a cable calibration. At that point every
installation adjusts to the same average TX IF gain regardless of the ADU cable length.
Additionally the FV-110GX system also compensates for variations of the cable
characteristics or loss over frequency.
1. You find the maximum allowed cable loss at Prerequisites on page 2-18.
5-14
1